1QIsaa was among the first mss first discovered by the bedouin at the end of 1946 or the beginning of 1947. It was also the first to be identified. Physically, the scroll is made up of seventeen sheepskin sheets, sewn together by a linen thread. Its average height is 26.2 cm, and it is 7.34 m long. Apart from some minor lacunae at the beginning and in the lower part of the scroll, 1QIsaa contains the complete text of the book of Isaiah, arranged in 54 columns. A facsimile of this scroll is now in the Shrine of the Book at Jerusalem.